中洋山頂の地震性は,極端なタイプの海洋石層を明らかにします
Vera Schlindwein1, Florian Schmid1
1Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany.
Nature
|July 1, 2016
まとめ
地震データによると,超低速に広がる山脊には冷たい,厚い石層があり,深い地震は広範囲の蛇形化を示しています. これは地殻の不連続な生成と 深い液体の循環を説明します
科学分野:
- 地理学
- 構造学
- 海洋学
背景:
- 超緩慢に広がる山脊は,連続した溶融と変動する石層の組成,構造,および構造変化を示す.
- これらの山脊の石層構造は,限られた地震データのために十分に理解されていません.
研究 の 目的:
- 岩層構造と超低速に広がる山脊の蓄積方法を調査する.
- 溶融の生成と流体循環に対する石層構造の影響を理解する.
主な方法:
- 細かい地震性調査は,超低速に広がる軸の390kmに沿って行われます.
- 地震の分布を分析して,石層の性質を推測する.
主要な成果:
- アマグマティック部分では,浅い地震がなく,深さ35kmまでの地震があり,蛇形化による冷たい厚い石層を暗示しています.
- マグマ質の石層は火山の中心の下に薄くなり,軸に沿った溶融の流れにおける石層-アステノスフィアの境界地図の役割を示唆している.
- 地震性は海底の変形と流体循環に影響を与える 海洋石層の深い変化を示しています
結論:
- 超低速に広がる山脈は,冷たい,厚い石層と深い変化地帯で特徴付けられています.
- リトスフィアとアステノスフィアの境界の地形は,溶融の分布と地殻の生成に影響を与えます.
- 深層流体の循環と変化は,海洋の石層形成において重要なプロセスである.
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